critical
9.1
CWE
20
Advisory Published
Updated

CVE-2021-46756: Input Validation

First published: Tue May 09 2023(Updated: )

Insufficient validation of inputs in SVC_MAP_USER_STACK in the ASP (AMD Secure Processor) bootloader may allow an attacker with a malicious Uapp or ABL to send malformed or invalid syscall to the bootloader resulting in a potential denial of service and loss of integrity.

Credit: psirt@amd.com psirt@amd.com

Affected SoftwareAffected VersionHow to fix
All of
AMD EPYC 72F3 Firmware=milanpi_1.0.0.9
AMD EPYC 72F3 Firmware
All of
AMD EPYC Firmware=milanpi_1.0.0.9
AMD EPYC 7313 Firmware
All of
AMD EPYC 7313P Firmware=milanpi_1.0.0.9
AMD EPYC 7313P Firmware
All of
Amd Epyc Server Firmware=milanpi_1.0.0.9
AMD EPYC 7343 Firmware
All of
AMD EPYC 7373X Firmware=milanpi_1.0.0.9
AMD EPYC 7373X Firmware
All of
AMD EPYC 73F3 Firmware=milanpi_1.0.0.9
AMD EPYC 73F3 Firmware
All of
AMD EPYC 7413 Firmware=milanpi_1.0.0.9
AMD EPYC 7413 Firmware
All of
AMD EPYC 7443P Firmware=milanpi_1.0.0.9
AMD EPYC 7443P
All of
AMD EPYC 7443P Firmware=milanpi_1.0.0.9
AMD EPYC 7443P Firmware
All of
Amd Epyc Server Firmware=milanpi_1.0.0.9
AMD EPYC Server
All of
AMD EPYC 7473X Firmware=milanpi_1.0.0.9
AMD EPYC 7473X Firmware
All of
AMD EPYC 74F3 Firmware=milanpi_1.0.0.9
AMD EPYC 74F3 Firmware
All of
AMD EPYC 7513 Firmware=milanpi_1.0.0.9
AMD EPYC 7513 Firmware
All of
Amd Epyc Server Firmware=milanpi_1.0.0.9
AMD EPYC 7543 Firmware
All of
AMD EPYC 7543P Firmware=milanpi_1.0.0.9
AMD EPYC 7543P Firmware
All of
AMD EPYC 7573X Firmware=milanpi_1.0.0.9
AMD EPYC 7573X Firmware
All of
AMD EPYC 75F3 Firmware=milanpi_1.0.0.9
AMD EPYC 75F3 Firmware
All of
AMD EPYC 7643P Firmware=milanpi_1.0.0.9
AMD EPYC 7643 Firmware
All of
AMD EPYC 7663 Firmware=milanpi_1.0.0.9
AMD EPYC 7663 Firmware
All of
AMD EPYC 7713P Firmware=milanpi_1.0.0.9
AMD EPYC 7713 Firmware
All of
AMD EPYC 7713P Firmware=milanpi_1.0.0.9
AMD EPYC 7713P Firmware
All of
AMD EPYC 7763 Firmware=milanpi_1.0.0.9
AMD EPYC 7763 Firmware
All of
AMD EPYC 7773X Firmware=milanpi_1.0.0.9
AMD EPYC 7773X Firmware
All of
AMD EPYC 7232p firmware=romepi_1.0.0.e
AMD EPYC 7232p firmware
All of
AMD EPYC 7252 Firmware=romepi_1.0.0.e
AMD EPYC 7252 Firmware
All of
AMD EPYC 7262 Firmware=romepi_1.0.0.e
AMD EPYC 7262 Firmware
All of
AMD EPYC 7272 firmware=romepi_1.0.0.e
AMD EPYC 7272 firmware
All of
AMD EPYC 7282 Firmware=romepi_1.0.0.e
AMD EPYC 7282 Firmware
All of
Amd Epyc Server Firmware=romepi_1.0.0.e
AMD EPYC 7302 Firmware
All of
AMD EPYC 7302P Firmware=romepi_1.0.0.e
AMD EPYC 7302P Firmware
All of
AMD EPYC Firmware=romepi_1.0.0.e
AMD EPYC 7352 firmware
All of
Amd Epyc Server Firmware=romepi_1.0.0.e
AMD EPYC 7402 Firmware
All of
AMD EPYC 7402P Firmware=romepi_1.0.0.e
AMD EPYC 7402P Firmware
All of
AMD EPYC 7452 Firmware=romepi_1.0.0.e
AMD EPYC Server
All of
AMD EPYC 7502 Firmware=romepi_1.0.0.e
AMD EPYC 7502 firmware
All of
AMD EPYC 7502P Firmware=romepi_1.0.0.e
AMD EPYC 7502P Firmware
All of
AMD EPYC 7532 Firmware=romepi_1.0.0.e
AMD EPYC 7532 Firmware
All of
AMD EPYC 7542 Firmware=romepi_1.0.0.e
AMD EPYC Server
All of
AMD EPYC 7552 Firmware=romepi_1.0.0.e
AMD EPYC 7552 Firmware
All of
AMD EPYC 7642 Firmware=romepi_1.0.0.e
AMD EPYC 7642 Firmware
All of
AMD EPYC 7662 Firmware=romepi_1.0.0.e
AMD EPYC 7662 Firmware
All of
AMD EPYC 7702p firmware=romepi_1.0.0.e
AMD EPYC Server
All of
AMD EPYC 7702 Firmware=romepi_1.0.0.e
AMD EPYC 7702P
All of
AMD EPYC 7742 Firmware=romepi_1.0.0.e
AMD EPYC Server
All of
AMD EPYC 7F32 Firmware=romepi_1.0.0.e
AMD EPYC 7F32 Firmware
All of
AMD EPYC 7F52 Firmware=romepi_1.0.0.e
AMD EPYC 7F52 Firmware
All of
AMD EPYC 7F72=romepi_1.0.0.e
AMD EPYC 7F72 Firmware
All of
AMD EPYC 7H12 Firmware=romepi_1.0.0.e
AMD EPYC 7H12 Firmware
All of
AMD EPYC 7251 Firmware=naplespi_1.0.0.j
AMD EPYC 7251 Firmware
All of
AMD EPYC 7261 Firmware=naplespi_1.0.0.j
AMD EPYC 7261
All of
Amd Epyc Server Firmware=naplespi_1.0.0.j
AMD EPYC Server
All of
Amd Epyc Server Firmware=naplespi_1.0.0.j
AMD EPYC 7301 Firmware
All of
AMD EPYC 7351P Firmware=naplespi_1.0.0.j
AMD EPYC 7351 Firmware
All of
AMD EPYC 7351P Firmware=naplespi_1.0.0.j
AMD EPYC 7351P Firmware
All of
AMD EPYC 7371 Firmware=naplespi_1.0.0.j
AMD EPYC 7371 Firmware
All of
AMD EPYC 7401P Firmware=naplespi_1.0.0.j
AMD EPYC 7401 Firmware
All of
AMD EPYC 7401P Firmware=naplespi_1.0.0.j
AMD EPYC 7401P Firmware
All of
AMD EPYC 7451 Firmware=naplespi_1.0.0.j
AMD EPYC 7451 Firmware
All of
AMD EPYC 7501 Firmware=naplespi_1.0.0.j
AMD EPYC Server
All of
AMD EPYC 7551P Firmware=naplespi_1.0.0.j
AMD EPYC 7551 Firmware
All of
AMD EPYC 7551P Firmware=naplespi_1.0.0.j
AMD EPYC 7551P Firmware
All of
Amd Epyc Server Firmware=naplespi_1.0.0.j
AMD EPYC Server
All of
AMD EPYC 7601 Firmware=naplespi_1.0.0.j
AMD EPYC 7601 Firmware
AMD EPYC 72F3 Firmware=milanpi_1.0.0.9
AMD EPYC 72F3 Firmware
AMD EPYC Firmware=milanpi_1.0.0.9
AMD EPYC 7313 Firmware
AMD EPYC 7313P Firmware=milanpi_1.0.0.9
AMD EPYC 7313P Firmware
Amd Epyc Server Firmware=milanpi_1.0.0.9
AMD EPYC 7343 Firmware
AMD EPYC 7373X Firmware=milanpi_1.0.0.9
AMD EPYC 7373X Firmware
AMD EPYC 73F3 Firmware=milanpi_1.0.0.9
AMD EPYC 73F3 Firmware
AMD EPYC 7413 Firmware=milanpi_1.0.0.9
AMD EPYC 7413 Firmware
AMD EPYC 7443P Firmware=milanpi_1.0.0.9
AMD EPYC 7443P
AMD EPYC 7443P Firmware=milanpi_1.0.0.9
AMD EPYC 7443P Firmware
Amd Epyc Server Firmware=milanpi_1.0.0.9
AMD EPYC Server
AMD EPYC 7473X Firmware=milanpi_1.0.0.9
AMD EPYC 7473X Firmware
AMD EPYC 74F3 Firmware=milanpi_1.0.0.9
AMD EPYC 74F3 Firmware
AMD EPYC 7513 Firmware=milanpi_1.0.0.9
AMD EPYC 7513 Firmware
Amd Epyc Server Firmware=milanpi_1.0.0.9
AMD EPYC 7543 Firmware
AMD EPYC 7543P Firmware=milanpi_1.0.0.9
AMD EPYC 7543P Firmware
AMD EPYC 7573X Firmware=milanpi_1.0.0.9
AMD EPYC 7573X Firmware
AMD EPYC 75F3 Firmware=milanpi_1.0.0.9
AMD EPYC 75F3 Firmware
AMD EPYC 7643P Firmware=milanpi_1.0.0.9
AMD EPYC 7643 Firmware
AMD EPYC 7663 Firmware=milanpi_1.0.0.9
AMD EPYC 7663 Firmware
AMD EPYC 7713P Firmware=milanpi_1.0.0.9
AMD EPYC 7713 Firmware
AMD EPYC 7713P Firmware=milanpi_1.0.0.9
AMD EPYC 7713P Firmware
AMD EPYC 7763 Firmware=milanpi_1.0.0.9
AMD EPYC 7763 Firmware
AMD EPYC 7773X Firmware=milanpi_1.0.0.9
AMD EPYC 7773X Firmware
AMD EPYC 7232p firmware=romepi_1.0.0.e
AMD EPYC 7232p firmware
AMD EPYC 7252 Firmware=romepi_1.0.0.e
AMD EPYC 7252 Firmware
AMD EPYC 7262 Firmware=romepi_1.0.0.e
AMD EPYC 7262 Firmware
AMD EPYC 7272 firmware=romepi_1.0.0.e
AMD EPYC 7272 firmware
AMD EPYC 7282 Firmware=romepi_1.0.0.e
AMD EPYC 7282 Firmware
Amd Epyc Server Firmware=romepi_1.0.0.e
AMD EPYC 7302 Firmware
AMD EPYC 7302P Firmware=romepi_1.0.0.e
AMD EPYC 7302P Firmware
AMD EPYC Firmware=romepi_1.0.0.e
AMD EPYC 7352 firmware
Amd Epyc Server Firmware=romepi_1.0.0.e
AMD EPYC 7402 Firmware
AMD EPYC 7402P Firmware=romepi_1.0.0.e
AMD EPYC 7402P Firmware
AMD EPYC 7452 Firmware=romepi_1.0.0.e
AMD EPYC Server
AMD EPYC 7502 Firmware=romepi_1.0.0.e
AMD EPYC 7502 firmware
AMD EPYC 7502P Firmware=romepi_1.0.0.e
AMD EPYC 7502P Firmware
AMD EPYC 7532 Firmware=romepi_1.0.0.e
AMD EPYC 7532 Firmware
AMD EPYC 7542 Firmware=romepi_1.0.0.e
AMD EPYC Server
AMD EPYC 7552 Firmware=romepi_1.0.0.e
AMD EPYC 7552 Firmware
AMD EPYC 7642 Firmware=romepi_1.0.0.e
AMD EPYC 7642 Firmware
AMD EPYC 7662 Firmware=romepi_1.0.0.e
AMD EPYC 7662 Firmware
AMD EPYC 7702p firmware=romepi_1.0.0.e
AMD EPYC Server
AMD EPYC 7702 Firmware=romepi_1.0.0.e
AMD EPYC 7702P
AMD EPYC 7742 Firmware=romepi_1.0.0.e
AMD EPYC Server
AMD EPYC 7F32 Firmware=romepi_1.0.0.e
AMD EPYC 7F32 Firmware
AMD EPYC 7F52 Firmware=romepi_1.0.0.e
AMD EPYC 7F52 Firmware
AMD EPYC 7F72=romepi_1.0.0.e
AMD EPYC 7F72 Firmware
AMD EPYC 7H12 Firmware=romepi_1.0.0.e
AMD EPYC 7H12 Firmware
AMD EPYC 7251 Firmware=naplespi_1.0.0.j
AMD EPYC 7251 Firmware
AMD EPYC 7261 Firmware=naplespi_1.0.0.j
AMD EPYC 7261
Amd Epyc Server Firmware=naplespi_1.0.0.j
AMD EPYC Server
Amd Epyc Server Firmware=naplespi_1.0.0.j
AMD EPYC 7301 Firmware
AMD EPYC 7351P Firmware=naplespi_1.0.0.j
AMD EPYC 7351 Firmware
AMD EPYC 7351P Firmware=naplespi_1.0.0.j
AMD EPYC 7351P Firmware
AMD EPYC 7371 Firmware=naplespi_1.0.0.j
AMD EPYC 7371 Firmware
AMD EPYC 7401P Firmware=naplespi_1.0.0.j
AMD EPYC 7401 Firmware
AMD EPYC 7401P Firmware=naplespi_1.0.0.j
AMD EPYC 7401P Firmware
AMD EPYC 7451 Firmware=naplespi_1.0.0.j
AMD EPYC 7451 Firmware
AMD EPYC 7501 Firmware=naplespi_1.0.0.j
AMD EPYC Server
AMD EPYC 7551P Firmware=naplespi_1.0.0.j
AMD EPYC 7551 Firmware
AMD EPYC 7551P Firmware=naplespi_1.0.0.j
AMD EPYC 7551P Firmware
Amd Epyc Server Firmware=naplespi_1.0.0.j
AMD EPYC Server
AMD EPYC 7601 Firmware=naplespi_1.0.0.j
AMD EPYC 7601 Firmware

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Reference Links

Frequently Asked Questions

  • What is CVE-2021-46756?

    CVE-2021-46756 is a vulnerability in the SVC_MAP_USER_STACK in the ASP bootloader of AMD Secure Processor that may allow an attacker to send malformed syscalls, leading to a denial of service and loss of integrity.

  • What is the severity of CVE-2021-46756?

    CVE-2021-46756 has a severity rating of 9.1, classified as critical.

  • How can I mitigate CVE-2021-46756?

    To mitigate CVE-2021-46756, it is recommended to apply the patches provided by AMD and follow the security guidelines outlined in the provided references.

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